Midea LRSJ-120/NYN1, Technical Manual

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2.3 Names of keys on the wire controller and the keypad operation description
2.4 Application of wire controller

Preparation before running the unit.
When you run the unit for the first time, all the indicators on the wire controller will light for 3s, and then,
display the fiducial web page. After no operation for 40s, all indicators will go out automatically except POOL
TEMP indicator lighting.
When the unit is running, if there is no operation or malfunction for 10s, the
backlight of the display will go out automatically.After 30s ,all indicator will disappear except operation mode
and pool temp.
By default, the unit operates Heat Mode. Change:
 Mode Selection
The unit is enhanced with three operation modes, Cool Mode, Heat Mode and Pump Mode.
Cool Mode
: The unit cools down swiming pool water by compressor drive according to heat-pump principle.
Used when the swiming temp. is high in summer.
Heat Mode
:The unit heats swiming pool water by compressor drive according to heat-pump principle. Used
when the ambient temp. is low.
Pump Mode
:The pump run for circling the water. Used when trial run or other necessary situation.
By default, the unit operates Heat Mode. Change: